Experiments on the reaction between rutile and chlorine in the presence of petroleum coke were carried out in a fluidized bed reactor. Inside diameter of the reactor is 15cm in the bed zone and is expanded to 90 cm in the freeboard zone, while the height is 183 cm in the bed zone and 82 cm in the freeboard zone. The ranges of experimental conditions used are as follows : reaction temperature is 750-1,000 ^oC, reaction pressure is held constant at 1 atm, the chlorine mole fraction is 0-0.8, the rutile composition in the bed is 10-90 wt%, and the static bed height is 25-45 ㎝. Average particle diameters of rutile and coke are 0.1 and 0.5 ㎜, respectively. The effects of the reaction temperature, the chlorine mode fraction, the static bed height and the rutile composition in the bed on the chlorine conversion and on the CO/CO₂ ratio in the product gas are investigated quantitatively. The experimental results were also compared with those of other investigators.